Butterscotch Mille-Feuille

Ingredients

• 1 sheetfrozen puff pastry, thawed
• 135 g (⅔ cup)sugar
• 2.5 ml (½ teaspoon)kosher salt
• 1vanilla bean, split and scraped
• 710 ml (3 cups)whole milk
• 32 g (¼ cup)cornflour
• 8 g (1 tablespoon)plain flour
• 4 largeeggs
• 57 g (4 tablespoons)unsalted butter, cut into pieces
• 30 ml (2 tablespoons)Scotch whisky
• 475 ml (2 cups)double cream
• 60 g (½ cup)icing sugar
• for sprinklingsmoked salt

Instructions

1. 1

   Heat the oven

   Heat the oven to 200°C (400°F). Line a 46 × 33 cm (18 × 13 inch) baking tray with baking parchment, and set out a second tray of the same size with another piece of parchment.

2. 2

   Bake the pastry

   Roll the pastry into a 30 × 38 cm (12 × 15 inch) rectangle and cut it into three equal rectangles, each about 30 × 13 cm (12 × 5 inches). Prick the pastry all over with a fork, then transfer it to the prepared tray. Cover with the second piece of parchment and place the other tray on top. Bake for 10–12 minutes, until the pastry is light golden and set. Remove the top tray and parchment, then bake for another 4–5 minutes until golden brown. Cool completely on a wire rack.

3. 3

   Warm the milk

   Meanwhile, put the sugar, salt, vanilla and 590 ml (2½ cups) of the milk in a large saucepan. Heat over medium-high until bubbles form around the edges. As it warms, whisk the cornflour, plain flour, eggs and remaining 120 ml (½ cup) milk together in a large bowl.

4. 4

   Cook the custard

   Gradually whisk ladlefuls of the hot milk mixture into the egg mixture to temper it. Once about two-thirds of the milk has been added, pour the egg mixture back into the pan. Cook over medium heat, whisking constantly. When it thickens and reaches a boil, stir vigorously and count to 60, then remove the pan from the heat.

5. 5

   Finish the cream

   Strain the pastry cream through a fine-mesh sieve into a bowl, then stir in the butter and Scotch. Set the bowl over an ice bath and stir occasionally until the cream reaches room temperature. Transfer it to a piping bag fitted with a medium round tip. If you are not using it straight away, cover the surface directly with cling film to prevent a skin forming.

6. 6

   Whip the cream

   In a medium bowl, whip the double cream with a hand mixer or balloon whisk until medium-stiff peaks form. Transfer it to a separate piping bag fitted with a medium round tip.

7. 7

   Cut the pastry

   Carefully trim the cooled pastry with a serrated bread knife so the three pieces match. Cut the long rectangles crosswise into pieces about 5 cm (2 inches) long.

8. 8

   Assemble and serve

   Arrange a third of the pastry pieces into a first layer, fitting them together like a puzzle. Pipe dots of pastry cream over it, then add a second pastry layer and pipe dots of whipped cream on top. Arrange the final pastry pieces on a baking tray and cover them completely with icing sugar. Torch the sugar carefully without burning it, dust with a second layer of icing sugar and torch again. Sprinkle with smoked salt and let the pastry cool for about 3 minutes before handling. Place the brûléed pastry on top of the mille-feuille and serve immediately.

What is mille-feuille?

Mille-feuille, French for “a thousand leaves”, is a layered pastry traditionally made with crisp puff pastry and pastry cream. This version adds Scotch to the vanilla custard and a whipped-cream layer for a softer contrast.

The recipe works by baking the pastry under a second tray to limit its rise, then finishing it uncovered for colour and crispness. A brûléed, sugared top and a little smoked salt give the dessert its butterscotch-like finish.

Nutrition and macros by portion

The nutrition label shows one serving as written: 560 calories, 10g protein, 54g carbs, 35g fat.

The pastry, sugar and flour provide most of the carbohydrates, while the cream, butter and puff pastry contribute much of the fat. Eggs, milk and cream supply some protein. Serve a slice with fresh fruit, or keep the accompanying drink unsweetened, to balance the rich layers.

Keep the pastry layers even

Puff pastry: Docking it with a fork and weighing it down between trays keeps the layers relatively flat, making the finished pastry easier to stack and cut.

Matching pieces: Trim the cooled sheets before cutting them crosswise. Similar-sized pieces help the layers sit neatly and make portions easier to serve.

Make a smooth pastry cream

Tempering: Add the hot milk gradually while whisking so the eggs warm gently rather than setting in the bowl.

Cooking: Keep whisking over medium heat, especially as the custard thickens. Once it boils, the recipe calls for vigorous stirring for 60 seconds to cook the starch through.

Finishing: Straining removes any small lumps, while butter and Scotch are stirred in after cooking. Cooling over ice brings the cream to room temperature before piping.

Watch the texture cues

Pastry: The first bake sets the structure and should leave the sheets light golden; the final 4–5 minutes deepen the colour. Cool them fully before trimming so they are less likely to crumble.

Cream: Whip the double cream to medium-stiff peaks, firm enough to pipe but not grainy. The pastry cream should be at room temperature when it goes into its piping bag.

Brûlée the sugar carefully

Cover the top pastry pieces evenly with icing sugar before using the torch. Work carefully and keep the flame moving so the sugar colours without burning.

Let the sugared pastry cool for about 3 minutes before handling, as directed. Add the smoked salt before placing it on top.

Assemble just before serving

Pipe distinct dots of pastry cream on the first pastry layer and whipped cream on the second, keeping the fillings within the edges. Fit the pieces together like a puzzle for each layer.

The assembled mille-feuille is served immediately, while the pastry is crisp. If preparing components in advance, keep them separate until close to serving time.

What to serve alongside

Serve the pastry on its own as a rich dessert, or pair it with fresh berries or sliced stone fruit for a tart, juicy contrast.

Coffee or unsweetened tea also works well alongside the sweet custard and caramelised sugar.

Recipe notes & tips

• Use fully thawed but still cool pastry so it is easier to roll and cut.
• Keep the second baking tray on top during the first bake to control how much the pastry rises.
• Whisk continuously while tempering the eggs and cooking the pastry cream.
• Press cling film directly onto any pastry cream you are storing to prevent a skin forming.
• Use a serrated knife and gentle strokes when trimming the cooled pastry.
• Assemble close to serving so the pastry stays crisp.

Variations

• Use vanilla extract: Stir it into the custard after cooking if you do not have a vanilla bean.
• Skip the Scotch: Leave it out for a vanilla pastry cream without whisky.
• Add berries: Serve fresh berries alongside the assembled pastry for a bright contrast.
• Change the salt: Use flaky sea salt instead of smoked salt for a less smoky finish.
• Make individual stacks: Arrange the pastry pieces as separate portions rather than one long mille-feuille.

Common mistakes to avoid

• Adding hot milk too quickly: Whisk it into the eggs a ladleful at a time to temper them gradually.
• Stopping the custard early: Once it boils, stir vigorously and count to 60 as the recipe directs.
• Skipping the weight: Use the second tray during the first bake to keep the pastry from rising too much.
• Trimming warm pastry: Let it cool completely first so it is easier to cut cleanly.
• Burning the sugar: Keep the torch moving and watch the surface as it colours.
• Assembling too early: Pipe and stack the layers close to serving to help preserve the pastry's crispness.

How to store

Store the pastry cream and whipped cream separately, covered, in the refrigerator and use within 2 days. Keep baked pastry pieces in an airtight container at room temperature for up to 1 day. Once assembled, serve immediately; the filled pastry softens in storage.

Frequently asked questions